Guðmundur Jón Halldórsson - Apache Accumulo for Developers

Gumundur Jn Halldrsson is a Software Engineer who enjoys the challenges of complex problems and pays close attention to detail. He is an annual speaker at the Icelandic Computer Society (SKY, http://www.utmessan.is/).

Gumundur is a Software Engineer with extensive experience and management skills, and works for Five Degrees (www.fivedegrees.nl), a banking software company. The company develops and sells high-quality banking software. As a Senior Software Engineer, he is responsible for the development of a backend banking system produced by the company. Gumundur has a B.Sc. in Computer Sciences from the Reykjavik University.

Gumundur has a long period of work experience as a Software Engineer since 1996. He has worked for a large bank in Iceland, an insurance company, and a large gaming company where he was in the core EVE Online team.

Gumundur is passionate about whatever he does. He loves to play online chess and Sudoku. And when he has time, he likes to read science fiction and history books.

He maintains a Facebook page to network with his friends and readers, and blogs about the wonders of programming and cloud computing at http://www.gudmundurjon.net/.

I would like to thank my two girls, Kolbrn and Brynds, for their patience while I was writing this book, and researching in the area of cluster computing.

Einar Th. Einarsson has been hacking computers since childhood, and has worked both as a Programmer and a System Administrator for more than 15 years in diverse fields such as online gaming, anti-malware, biotech, and telecommunications, at companies such as CCP Games, FRISK Software, and deCODE Genetics. He is currently the CTO of a startup company focused on providing tools for the online poker world.

Andrea Mostosi is a passionate Software Developer. In 2003, while he was at high school, he started with a single-node LAMP stack and grew up by adding more languages, components, and nodes. He graduated in Milan and worked on several web-related projects. He is currently working with data, trying to discover information hidden behind huge datasets.

I would like to thank my girlfriend Khadija, who lovingly supports me in everything I do, and the people I collaborated with, for fun or for work, for everything they taught me. I would also like to thank Packt Publishing and its staff for this opportunity to contribute to this production.

Plmi Skowronski holds a bachelor's and a master's degree in Computer Science from Reykjavk University, with a focus on machine-learning and heuristic searches.

Most recently, he has been working in the financial sector developing distributed enterprise solutions with Five Degrees as a Senior Developer, and is currently working on smart analysis of financial transactions with Meniga as a Software Specialist.

I would like to thank the author Mr. Halldrsson, a friend and colleague, for the many laughs and stimulating conversations we had during the writing of this book. May there be many more in the near future.